nervous
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| extracellular fluid is rich in | Na and Cl
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| inward flow of ___ cant keep up with outward flow of ___ | na/ K
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| graded potentials have _____ and ______ | hyperpolarization and depolarization
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| membrane has become more negative | hyperpolarization
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| membrane has become more positivit | depolarizaion (goes up) MV
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| in ____ the signals are ____, meaning they vary in alplitude (size), depending on the strength of the stimulus and localized | graded
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| graded potentials occur most often in the ___ and _____ of a neuron | dendrites and cell body
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| _____ stiumulation of membranes with mechanical gated ion channels (pressure) | mechanical
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| ____ stiumulation of membranes with ligand gated ion channels (neurotrasnmitter) | chemical
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| ____ or _____ is a sequence of radibly occuring events that increase and eventually reverse the membrane potential (depolarize) and then restore it to the resting state (repolarize) | action potential (AP)
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| During an AP, voltaged gated ____ and ____ channels open in sequence | Na and K
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| when Na rushes in its | depolarization
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| K rushes out it is | repolarization
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| in the depolarizing phase of AP the voltaged gated ____ channels open and __ rushes into cell | Na
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| depolarizing is an example of | positive feedback process
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| when a chem or mech. stimulus caused a graded potentiatl to reach at least -55mV or threshold | depolarization
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| when threshold pontential of -55 is reach, voltaged gated K channels open | repolarizing
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| in repolarizing ___ channel is much slowing than Na channel opening which caused depolaization | K
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Created by:
Mollie28
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